<?php
function getIP() { 
        if(getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) { 
            $ip = getenv("HTTP_CLIENT_IP"); 
        } elseif(getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")) { 
            $ip = getenv("HTTP_X_FORWARDED_FOR"); 
        } elseif(getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")) { 
            $ip = getenv("REMOTE_ADDR"); 
        } elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")) { 
            $ip = $_SERVER['REMOTE_ADDR']; 
        } else { 
            $ip = "Bilinmiyor"; 
        } 

        return $ip; 
} 
echo getIP();
?>